// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_CLEAR_FRAMEBUFFER_H_
#define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_CLEAR_FRAMEBUFFER_H_

#include "gpu/command_buffer/service/gl_utils.h"
#include "gpu/gpu_export.h"

namespace gfx {
class Size;
}

namespace gpu {
namespace gles2 {
    class GLES2Decoder;
}

class GPU_EXPORT ClearFramebufferResourceManager {
public:
    ClearFramebufferResourceManager(const gles2::GLES2Decoder* decoder);
    ~ClearFramebufferResourceManager();

    void ClearFramebuffer(const gles2::GLES2Decoder* decoder,
        const gfx::Size& framebuffer_size,
        GLbitfield mask,
        GLfloat clear_color_red,
        GLfloat clear_color_green,
        GLfloat clear_color_blue,
        GLfloat clear_color_alpha,
        GLfloat clear_depth_value,
        GLint clear_stencil_value);

private:
    void Initialize(const gles2::GLES2Decoder* decoder);
    void Destroy();

    // The attributes used during invocation of the extension.
    static const GLuint kVertexPositionAttrib = 0;

    bool initialized_;
    GLuint program_;
    GLuint depth_handle_;
    GLuint color_handle_;
    GLuint buffer_id_;

    DISALLOW_COPY_AND_ASSIGN(ClearFramebufferResourceManager);
};

} // namespace gpu.

#endif // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_CLEAR_FRAMEBUFFER_H_
